<?php
$data = [
    'a' => [1],
    'b' => [2],
    'c' => [3],
];

echo reset($data)[0];

exit;

echo '//';
echo '\\/';
echo str_replace(['//'], ['\\/\\/'], 'http://');
exit;

$str = <<<'STR'
model this is  a test
123 abc dba_handlers()
<div class="am-alert" data-am-alert>
  <button type="button" class="am-close">&times;</button>
  <p>内容</p>
</div>
gopher_parsedir(svn_fs_dir_entries(
, path))
zend_version(oci_internal_debug(
))
<a href="mailto:joe@example.com?subject=feedback" "email me">email me</a>
<main>

</main>
xml_parse(parse_ini_string(), data)
STR;
echo $str.PHP_EOL;
echo PHP_VERSION.PHP_EOL;


